Posture support device



FIG. 1 is a front perspective view of a posture support device in accordance with the present design;

FIG. 2 is back perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines in the drawings are for the purpose of illustrating stitching and form no part of the claim. The unevenly dashed broken lines in the figures showing a human torso are for the purpose of illustrating environment and form no part of the claim. 

CLAIM The ornamental design for a posture support device, as shown and described. 